Method and system for diagnosing state of gas turbine

A system of diagnosing a condition of a gas turbine, the system comprising:

• sensors installed to the gas turbine;
• means for calculating values of equivalent operating time using process information detected by said sensors and operation information of the gas turbine, each of said values of equivalent operating time being a value at which a degree of damage of a diagnosed position for each of a plurality of degradation-and-damage modes is evaluated by operating time;
• means for calculating a value of whole equivalent operating time by adding said values of equivalent operating time for the individual degradation-and-damage modes;
• means for diagnosing the condition of the gas turbine based on said calculated value of whole equivalent operating time and a predetermined management basis;
• and
• means for displaying a result diagnosed by said diagnosing means.

A system of diagnosing a condition of a gas turbine, the system comprising:

• an operation monitoring unit for acquiring process data from sensors installed to said gas turbine and operation data of said gas turbine;
• communication units for transmitting each kind of data acquired in said operation monitoring unit;
• an analysis server which calculates values of equivalent operating time using each kind of data transmitted through said communication units, each of said values of equivalent operating time being a value at which a degree of damage of a diagnosed position for each of a plurality of degradation-and-damage modes is evaluated by operating time, calculates a value of whole equivalent operating time by adding said values of equivalent operating time for the individual degradation-and-damage modes, and diagnoses the condition of the gas turbine based on said calculated value of whole equivalent operating time and a predetermined management basis;
• and
• a facility management unit having said analysis server and a WWW browser or WWW server.

A method of diagnosing a condition of a gas turbine, the method comprising the steps of:

• calculating a value of first equivalent operating time relating to creep damage of a component part composing said gas turbine, using operation data of said gas turbine and process data measured by sensors installed to said gas turbine, while operating said gas turbine;
• calculating a value of second equivalent operating time relating to fatigue damage of the component part using said operation data and said process data;
• calculating a value of third equivalent operating time based on the value of first equivalent operating time and the value of second equivalent operating time;
• and
• diagnosing a condition of said gas turbine based on the value of third equivalent operating time and a management basis.

A system for diagnosing a condition of a gas turbine, which comprises:

• means for calculating a value of first equivalent operating time relating to creep damage of a component part composing said gas turbine, using operation data of said gas turbine and process data measured by sensors installed to said gas turbine, while operating said gas turbine;
• means for calculating a value of second equivalent operating time relating to fatigue damage of said component part using said operation data and said process data;
• means for calculating a value of third equivalent operating time based on said value of first equivalent operating time and said value of second equivalent operating time;
• and
• means for diagnosing a condition of said gas turbine based on said value of third equivalent operating time and a management basis.